Thermostatic core centralizer



H. S. LEE

THERMOSTATIC CORE GENTRALIZER Dec. 29 1925.

Filed Jan. 8, 1925 4 Sheets-Sheet 1 I N VEN TOR.

77am fizee BY M ATTORNEY.

Dec. 29, 1925 V H. 5. LEE

THERMOSTATIC CORE CENTRALIZEH 4 Sheets-Sheet 2 Filed Jan. 8, 1925 ATTORNEY;

H. s. LEE

Dec. 29, 1925- v Dec. 29, 1925' 1,567,605

7 H. 5. LEE

THERMOSTATIC CORE CENTRALIZER Filed Jan. 8, 1925 4 Sheets-Sheet 4 l i INVENTOR.

' ATTORNEY.

I Patented Dec. 29, 1925.

To all whom i concern:

UNITED STATES? PA EN r OFFICE.

HARRY stun, or rnv'mou'rrr, MICHIGAN.

mnnnuos'ra'rrc Conn onmmrznn.

Application filed January Be it'known, that I, HARRY S. LEE acitizen of the United States, residing at Plymouth, in the county of Wayneand State. of Michigan, have invented certain new and useful Improvements in Thermostatic. Core Centralizers, of which the following is a specification.

' This invention relates to permanent moulds, and has for its object the provision of a thermo-responsive compensating device calculated to take up the clearance which must necessarily occur. between the core and the mould sections-where the core is supported by the mould sections.

In permanent moulds, the mould sections are made ordinarily of metals which will have some expansion when they become heated. This will, therefore, leave a slight clearance betweenthe core and the mould, and will permit the core to .shift in the mould, thereby resulting in an imperfect casting. It is the object of the present invention toprovide thermo-responsive members which will automatically compensate for such expansion and take up the clearance whichwould otherwise occur between the core and the mould sections; In my co-pending application, Serial No. 1,168 the generic invention is claimed and the specific mechanical devices for permit-'- nently taking up the clearance, and in my 'co pending application, Serial No. 1,167 ancharacter) showing a moul my thermo-responsive compensating device.

other type ofmechanical device is claimed which operates automatically to take up the clearance The present a plication is confined to an automatic device that is calculated to take up this clearance, both automatically and in accordance -with thermoconditions existing in the mould.

In the draw' Fig. lnisla p an view gfragmentary in equipped with Fig. 2 is a section taken on the line 2- 2 of Fig. 1. v D Fig. 3 is a section taken on the line 33 ofF1g.2. Fig. 4 is a plan viewof the modified to of compensating device.

Fig. 5 is asection taken on the line 55 ofFiguL;

6 is a section taken on the line 6-6 of Fig. 5. I A i 'Figs. 7 to 13 inclusive are similar views of modified. f rms of tonstrnction, the secjof the m a spacing block n is 8, 1925. Serial No. 1,166.

tion lines in the several views indicating where the view of the Figs.- 15 and 16 are views of further modified construction.

a and 75 represent two sections, of a split mould. cTheSe sections are provided with annular grooves d and e to receive the corresponding ribs 7 and g of the core 0 (see Fig. 13). The core is fitted into one see- Hence the contact of the core headwith the upper part of the mould suspends the core in proper relation with respect to the mould. However, when the mould heats up itrcauses the same to expand slightly and draw away the mould, were it not for my automatic compensating-device which .I am about to describe.

1 In the-form shown in Fig. 1 an adjustable abutment h is provided by the threaded stud j-of the jamb nut 2'. Supported against this abutment is a thermo-responsive block k. I find that aluminum is a good material for the construction of such a block, but

obviousl other suitable metals might be provid The co-efficient of expansion of.

the aluminum with r mg type of thermo-responsive element 0. This is the same action but a different type I of element. In Figs. 7, 8 and 9 the thermo= responsive block p issupported in. place by the pinsg.

In'the forms shown m Figs. 10 and 11 the thermo element is inthe ect to the cast iron' mould is such that the aluminum elongates .sufliciently in an inward direction to comsame number is taken.

tion' oi the mould when' the other section has been; withdrawn. This will support the "corewhile such other section is replaced.

.from the core. This leaves the clearance m shown m an exaggerated form in Fig. 13. -Tll1S would permit the core to shift into a flat bowform of a headed stud r, and in the forms shown in Figs. 12, 13 and 14 the thermo element isin. the form of a segment of a ringwhich bows out as at s when the. heat causes the elongation of the ring.

In Figs. 15 and 16 is shown a modified construction in which the sliding blocks is yieldingly forced inwardly by the thermo responsive, spring elementsv 11. It will be noticed that the elements 11 normally exert a pressure urging the sliding blocks inwardly to centralize the core to take up the clearance between the, core and the mould sections when the mould expands. The

thermo-responsive element also will exert a further pressure when the temperature of the mould increases, thereby increasingthe pressure'exerted by the sliding blocks onto the core. l e

What I claim is: 1. In a permanent mould, the combination of a plurality of mould sections of expansible material, a core supported therein by contact with the mould sections, and a thermally controlled means for taking up the clearance between the core and the mould sections due to the expansion of the mould.

2, In a permanent mould, the combination of a plurality of moulded sections of expansible material a core supported therein by contact with the mould walls, and thermoresponsive expansion devices for taking up the clearance between the core and the mould due to the expansion of the latter 8. In a permanent mould, the combination of a plurality of expansible mould sections,

.35 a core supported therein by contact with the memos mould walls and members supported on the mould sections of thermo-responsive material for compensating for the expansion of the mould walls and for centralizing the core notwithstanding the said expansion.

l. In a permanent mould, the combination of a plurality of mouldsections of expansible material, a core supported in the mould by contact with mould walls, members of thermo-responsive material for compensating for the expansion of the mould and con-- tralizing the core notwithstanding said expansion and adjustable means for altering the position of such members. f

5. In a permanent mould, the combination of a plurality of expansible mould sections,

va. core supported therein by contact with the mould Walls and thermo-responsive devices for taking up clearance between the core and the mould due to the expansion of the latter.

6. In a-permanent mould, the combination of a plurality of expansible mould sections,

a core supported therein by contact with the signature.

' RRY S. LEE. 

